Accessing certain glyphs (e.g. Zapfino Ornaments)

This isn't so much a question as an answer I found after pulling my hair out, knowing that this *used* to be simple in Mac OS X (bring back KeyCaps!), but the solution has eluded me until now. Hopefully, this explanation will help someone else ...

Scrolling through Zapfino's repertoire in Font Book, I found a glyph I wanted to use:

I tried the Copy button, then pasting into various apps, every time it inserted a bullet, even if my font were set to Zapfino where I pasted. I read in another thread that Zapfino Glyphs was a separate font that wasn't free, but it didn't seem right that Font Book would show me a character I cannot use.

I got a clue in another thread, there is a Typography subpanel in the Fonts panel. Then I just started pressing every key on the keyboard. Then I hit caps lock and repeated the process.

I discovered that glyph is Capital E on the keyboard with Ornaments checked in the Typography subpanel. I also noticed this trick doesn't work in every app (e.g., it works in TextEdit and Scrivener, but not Mail).

I hope that helps.

This is an atrocious user experience. Apple, please fix.